var createError = require("http-errors");
var express = require("express");
var path = require("path");
var cookieParser = require("cookie-parser");
var logger = require("morgan");
var history = require("connect-history-api-fallback");

// 可使用cors模块处理跨域问题
// var cors = require("cors");

var indexRouter = require("./routes/index");
var usersRouter = require("./routes/users");

var app = express();
//设置跨域访问
// app.use(cors());

//也可使用中间件，cros跨域资源共享
// app.all("*", function (req, res, next) {
//   res.header("Access-Control-Allow-Origin", "*");
//   res.header("Access-Control-Allow-Headers", "X-Requested-With");
//   res.header("Access-Control-Allow-Methods", "PUT,POST,GET,DELETE,OPTIONS");
//   res.header("X-Powered-By", " 3.2.1");
//   res.header("Content-Type", "application/json;charset=utf-8");
//   next();
// });
// view engine setup
app.set("views", path.join(__dirname, "views"));
app.set("view engine", "pug");

app.use(logger("dev"));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use("/", indexRouter);
// app.use("/users", usersRouter);

app.use(history()); //使用history   最好放到pubic静态目录前

app.use(express.static(path.join(__dirname, "public")));

// catch 404 and forward to error handler
app.use(function (req, res, next) {
  next(createError(404));
});

// error handler
app.use(function (err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get("env") === "development" ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render("error");
});

module.exports = app;
